FILM-FORMATION PROCESS OF ACRYLIC POLYURETHANE COATING SYSTEM(Ⅰ)ESTIMATION OF SOLVENT DIFFUSION COEFFICIENTS

XIA Zhengbin; TU Weiping; CHEN Huanqin

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FILM-FORMATION PROCESS OF ACRYLIC POLYURETHANE COATING SYSTEM(Ⅰ)ESTIMATION OF SOLVENT DIFFUSION COEFFICIENTS

更新时间：2025-12-10

- FILM-FORMATION PROCESS OF ACRYLIC POLYURETHANE COATING SYSTEM(Ⅰ)ESTIMATION OF SOLVENT DIFFUSION COEFFICIENTS
- CIESC Journal Issue 10, Pages: 1442-1445(2003)
- 作者机构：
  
  华南理工大学化工学院,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 October 2003，
  
  Published：25 October 2003
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XIA Zhengbin, TU Weiping, CHEN Huanqin. FILM-FORMATION PROCESS OF ACRYLIC POLYURETHANE COATING SYSTEM(Ⅰ)ESTIMATION OF SOLVENT DIFFUSION COEFFICIENTS[J]. CIESC Journal, 2003, (10): 1442-1445.
DOI：

XIA Zhengbin, TU Weiping, CHEN Huanqin. FILM-FORMATION PROCESS OF ACRYLIC POLYURETHANE COATING SYSTEM(Ⅰ)ESTIMATION OF SOLVENT DIFFUSION COEFFICIENTS[J]. CIESC Journal, 2003, (10): 1442-1445. DOI：

摘要

采用傅里叶变换红外光谱（FTIR）测定了不同时间下丙烯酸聚氨酯涂料体系成膜聚合物的固化度及固化反应速率常数，并将该体系按二元聚合物-溶剂体系进行简化处理，在Vrentas-Duda自由体积理论模型的基础上，利用Di-Benedetto方程关联了溶剂的扩散系数与涂膜的固化度，建立了涂膜中溶剂扩散系数的预测模型.结果表明，本涂膜体系中溶剂扩散系数是溶剂浓度、干燥时间的函数.

Abstract

In this paper

the curing extent of polymer film and the reaction speed constant of the crosslinking and curing in the acrylic polyurethane coating system were determined by FTIR analysis. The film-formation process of this coating system was simply treated as that of a binary polymer-solvent system. On the basis of Vrentas-Duda free volume theory

the diffusion coefficient of solvent and the reaction extent of film-formation polymer are correlated by introducing Di-Benedetto equation

and the self and mutual diffusion coefficients of the solvent in this system were calculated.It was shown that the diffusion coefficients of the solvent in such a thermosetting coating were dependent on solvent concentration and drying time.

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